text: /**********************************************************************
  
    Audacity: A Digital Audio Editor
  
    SpectralSelectionBarListener.h
  
    Paul Licameli
  
  **********************************************************************/
  
  #ifndef __AUDACITY_SPECTRAL_SELECTION_BAR_LISTENER__
  #define __AUDACITY_SPECTRAL_SELECTION_BAR_LISTENER__
  
  #include "../Audacity.h"
  
  class IdentInterfaceSymbol;
  using NumericFormatId = IdentInterfaceSymbol;
  
  class AUDACITY_DLL_API SpectralSelectionBarListener /* not final */ {
  
   public:
  
     SpectralSelectionBarListener(){}
     virtual ~SpectralSelectionBarListener(){}
  
     virtual double SSBL_GetRate() const = 0;
  
     virtual const NumericFormatId & SSBL_GetFrequencySelectionFormatName() = 0;
     virtual void SSBL_SetFrequencySelectionFormatName(const NumericFormatId & formatName) = 0;
  
     virtual const NumericFormatId & SSBL_GetBandwidthSelectionFormatName() = 0;
     virtual void SSBL_SetBandwidthSelectionFormatName(const NumericFormatId & formatName) = 0;
  
     virtual void SSBL_ModifySpectralSelection(double &bottom, double &top, bool done) = 0;
  };
  
  #endif
  